White kidney bean blocking tablets have the effect of inhibiting the conversion of starch to glucose, many people make white kidney bean blocking tablets for weight loss, but white kidney bean blocking tablets have certain contraindications, need to pay attention when taking. 1. Minors, pregnant and lactating women: these three groups of people are in a special period of time, the body metabolism is faster, need to supplement a large number of nutrients, so you can not use the white kidney bean blocking tablets. 2. Patients with indigestion: patients with chronic gastritis and gastric ulcer often have symptoms of indigestion such as bloating and nausea, taking white kidney beans can aggravate gastrointestinal discomfort and affect the intake and absorption of nutrients. 3. Hyperkalemia, renal insufficiency patients: white kidney beans are rich in potassium, such patients will further increase blood potassium after taking, should be avoided. In the use of white kidney bean blocking tablets, need to be applied under the guidance of a doctor, such as taking the process of any physical discomfort, go to the hospital in a timely manner.